Southwest Airlines currently has a fleet coverage of 86.2% planned but has not yet equipped any aircraft with Starlink as of the latest data (May 2026). The rollout status is 'rolling_out' with an announced start in summer 2026, and no confirmed Starlink observations or community sightings exist on the ISP->BWI route. Given the zero observed Starlink rate and the airline's announcement that no aircraft are currently equipped, the probability is anchored at 0.0. The high fleet coverage is a future projection, not current reality, so it does not raise the probability above zero at this time.